An MRI of 49ers running back Brandon Jacobs' left knee showed no serious damage, a league source said on Sunday. The 49ers would not confirm the results.
Two tweets Jacobs wrote just after Sunday's MRI seemed to convey the same thing.
The first came in at 4 p.m.: "Yeeeeaaaa," it read.
The second arrived 41 minutes later: "Good Good Good."
The running back had to be carted off the field Saturday in Houston after a tackler slammed into his left knee following an eight-yard run. X-rays taken at Reliant Stadium showed no damage to his ACL or his patellar tendon, and Jim Harbaugh said it was not going to be a season-ending type of injury.
The MRI was designed to see if there was anything amiss with the MCL, which is in the inside of the knee where trainers appeared to be probing after the hit. Images taken Sunday showed no significant damage there, either. The time table for Jacobs' recovery is not known at this point and his availability for the 49ers' first regular-season game Sept. 9 in Green Bay is up in the air.
One Twitter addendum: Jacobs revealed that the Texans defender who tackled him, Kareem Jackson, was concerned that he had injured the big 49ers running back. Wrote Jacobs last night: "Big ups to Kareem Jackson from the Texans he is a classy guy, he came to the X-ray room to wish me a speedy recovery."
-- Matt Barrows